To make the quiver, measure around the tube, cut fabric to fit the tube plus 1 inch for your seams. Then you sew on your pockets, turn the fabric inside out, and sew the sides and the bottom. Then, turn right side out again, slide in tube, make sure you put a cap on one end, fabric cover with velcro on top. Walla!!
Total cost per quiver, about $20 bucks. oh yea. almost forgot, drill two holes and attach back strap using a bolt and locking nuts.
Whatever plastic tube you get, make sure it has holes to let air in and out. Otherwise if you shoot feathers, on a warm moist day your feathers could be toast.
If you don't know how to sew, learn, it will save you lots of money. I learned because what I wanted was either too expensive, or poor quality. Mine are 4 1/2 wide by 35 tall for target arrows, 37 for hunting. I leave my arrows in them at all times, when I hunt, I use a bow quiver. I never take my back quiver out to the field because if you need to get an arrow fast, your out of luck!
Dave